When I was truck driving I used my Garmin Street Pilot which, together with many Garmins, has the facility to set the type of vehicle. This affected the type of road the routes would use and meant that when you went off route it would suggest "round the block" solutions instead of U turns. I also subscribed to POI databases of low bridges which were very good. It was not possible to set a route to avoid the bridges but I set the satnav to warn me a mile before them so on the odd occasion there was a route with a low bridge I could just press the divert button on the satnav to work round it.
When my Garmin got stolen I used a Tomtom for a bit. This could not be set for vehicle type and often suggested unsuitable roads. Maybe all those headlines of trucks stuck in villages due to following satnavs relate to Tomtom users? |